Donald Trump and Bernie Sanders continued to hold commanding leads in New Hampshire, but challengers Marco Rubio and Hillary Clinton are closing ground following their strong Iowa performances, a new poll revealed Thursday.

Trump has the support of 36 percent of likely voters in next week’s GOP primary, ahead of Rubio (15 percent), Iowa caucus winner Ted Cruz (14 percent), Jeb Bush (8 percent), John Kasich (7 percent), Chris Christie (5 percent) and Ben Carson (4 percent), according to findings by the University of Massachusetts Lowell and WHDH-TV.

This latest poll was taken between Monday and Wednesday.

When UMass Lowell and WHDH canvassed likely GOP New Hampshire voters Friday through Sunday – so just before Iowa – Trump was on top with 38 percent but Rubio was all the way down in fifth place with just 8 percent.

On the Democratic side, Sanders – from neighboring Vermont – led Clinton, 58-36, in this latest poll.

But over the weekend, before Iowa, Sanders’ lead then was 61-30, according to the UMass Lowell and WHDH poll.